Thread: Starting a long dead P38

Yep, that's right re the EMS. Put the code into the BECM and see if the EMS learns from the BECM by copying the (say) 1 2 3 code as its new Master code. While you're at it, "reset" the adaptive values of the EMS also.
cheers

UPDATE: BeCM is Locked. Toggled it to Unlocked and Write Settings (successfully) but on reading again it is Locked. So, all of this Security Learn and code entry is pointless as Nanocom Evo can't unlock a BeCM right?
What next- pull BeCM, EMS and a key fob and search for a wizard?
TIA
Steve
BTW: Not getting any messages apart from windows and sunroof not set on the message centre, just a Check Engine light, no faults and some clicky relay noises when I try to start. Battery voltage holds at >11.6V all the time so it's OK.

If the ems doesn't accept the security code from the becm it won't illuminate the check engine light when you turn on the ignition.

Originally Posted by zzsteve

UPDATE: BeCM is Locked. Toggled it to Unlocked and Write Settings (successfully) but on reading again it is Locked. So, all of this Security Learn and code entry is pointless as Nanocom Evo can't unlock a BeCM right?
What next- pull BeCM, EMS and a key fob and search for a wizard?
TIA
Steve
BTW: Not getting any messages apart from windows and sunroof not set on the message centre, just a Check Engine light, no faults and some clicky relay noises when I try to start. Battery voltage holds at >11.6V all the time so it's OK.

Battery voltage may be your problem: 11.6V or thereabouts is very low... try a jump start using a healthy battery from a vehicle that's idling...

Thanks gents,
I might try one of those Caterpillar batteries.
Where's the definitive reference on BeCM and EMS communications?
Cheers,
Steve

My BECM is also locked but it still accepts rewriting of the EMS code.
A fully charged battery in good condition is critical for proper functioning of the P38. Otherwise you can experience all sorts of niggling faults.
Simply hook up the healthy battery with jumper leads (don't forget the negative from the donor battery to the lifting eye or some other good earth point ) AND cables clear of things that rotate!! and see what happens when you try and start it...


EDIT: have a read of RAVE re. the EMS and BECM as well as the Elec. Trouble shooting Manual. There's a deal of descriptive info about which connects to what etc.

Black box solutions have a specific bit of kit that rewrites the code. I have one for a Thor but no good for gems. Just plug it into the comms port and after a few led blinks all is reset.
If you have access to a spare main fuse box I would swap over and try.

This is available from Lee Bourgeois to get around immobilization with the GEMS system:
Mobi-Lize